Gas Phase
MCAT Basics (from MedSchoolCoach)
MedSchoolCoach
4.6 • 612 Ratings
🗓️ 17 June 2025
⏱️ 17 minutes
🧾️ Download transcript
Summary
In this episode, guest host Alex Starks dives into Gas-Phase Concepts for the MCAT. He breaks down the physical properties of gases, explores the ideal gas law, and unpacks the ABCD laws of gases. Alex also covers key conditions that influence molecular collisions in gases and highlights the most important takeaways to help you excel in this section of the exam.
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Jump into the conversation:
(00:00) Intro: Med School Coach promotion and podcast introduction
(02:01) Physical properties of gases
(06:03) The ideal gas laws
(09:40) Conditions that promote molecular collisions in gases
(10:34) The ABCD gas law
(13:02) The Van der Waals equation
(14:33) Gas laws quiz
(16:29) Key takeaways
Transcript
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| 0:00.0 | Welcome to MCAT Basics, your ultimate guide to the essential topics you need to master for the MCAT, |
| 0:07.0 | brought to you by the physicians at Med School Coach. |
| 0:10.0 | Every week, Sam Smith breaks down high-yield MCAT topics, ensuring you're primed for success on test day. |
| 0:17.0 | Join Sam as we explore the most crucial subjects outlined by the AAMC, pulled from official practice materials and third-party resources. |
| 0:24.9 | Get ready to elevate your MCAT game with topics tailored to maximize your score potential. |
| 0:30.2 | Today's guest host is Alex Starks. |
| 0:32.5 | Hey everyone. |
| 0:33.5 | Welcome to the MCAT Basics podcast hosted by MedSchool Coach. |
| 0:37.0 | My name is Alex Starks. I've been teaching, tutoring, and creating content for the MCAT for about six years now, and I've kept a really close eye on how the test has evolved. So today we're going to talk about the gas phase. Now, we usually don't see gases, and so our conception of it tends to be vague at best and just plain wrong at worst. |
| 0:54.8 | So we're going to clear a few things up and make sure we're on the same page. |
| 0:58.7 | So if you consider a particle, and if the particle has sufficient connect energy, then it will |
| 1:04.1 | exist in the gas form. |
| 1:06.7 | And that would be after it undergoes a phase transition from either a liquid like boiling water or from |
| 1:12.0 | sublimation being from its solid phase and this is what's happening when your ice keeps mysteriously |
| 1:16.7 | disappear in the freezer so phase transitions and all that isn't what we're going to spend our |
| 1:21.3 | time talking about i really want to focus more on the physical aspects of gases so let's get to it |
| 1:26.3 | physical properties of a gas now a gas has no fixed volume and no fixed shape. |
| 1:30.3 | At the macroscopic level, if the gas was colored, we could see it and we could observe how it diffuses through a room, for example. |
| 1:36.3 | But at the microscopic level, gas particles are considered be very far apart, and that's going to be important item. |
| 1:43.3 | So, these particles move insanely fast and functionally independent of each other. |
| 1:49.0 | These properties are why gases are able to expand inside a container. |
| 1:52.0 | So if that seems a little abstract, just recall the last time you sprayed febreeze in the bathroom or something, |
... |
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